Police forensic fingerprint dust covered the railing and glass below it, and smears of dust remained on the veranda doors and handle. An outdoor chair and table remained in place beside the railing, also covered in forensic powder.

The picture shows a 1.5m wide deck on the lower level of the ship, which Ms Schroder missed as she plunged over the railing from the couple's third-floor cabin.

Police confirmed their investigation into the couple's deaths was centred around how Ms Schroder managed to plunge outwards from the balcony and miss the decking below. They would not rule out self-harm and that Mr Rossington had jumped to save his girlfriend.

The couple, from Barraba, were on the last night of their 10-day holiday when the tragedy happened.

They were onboard with Ms Schroder's family, including parents Reg and Roxene Dennis, who did not know the pair was missing until the ship docked in Sydney and their luggage was not collected.

Mr Rossington's family, friends and colleagues will remember the well-regarded paramedic at a memorial service on Thursday at All Saints' Anglican Church at Petersham, from 10am.

His father and older brother yesterday posted tributes on a memorial site set up in Mr Rossington's honour.

"We love and miss you so very much Paul, I look forward till the day we meet again. Rest in peace little bro," brother Justin Rossington said. Richard Rossington spoke of the eternal connection between a father and son.

The Rossington family has requested that in lieu of flowers, donations be made to the Ambulance Service of NSW

DONATIONS TO THE AMBULANCE SERVICE OF NSW, LOCKED BAG 105, ROZELLE, 2039